2190958993 has 2 divisors, whose sum is σ = 2190958994. Its totient is φ = 2190958992.

The previous prime is 2190958981. The next prime is 2190958999. The reversal of 2190958993 is 3998590912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1485100369 + 705858624 = 38537^2 + 26568^2 .

It is a cyclic number.

It is not a de Polignac number, because 2190958993 - 2⁹ = 2190958481 is a prime.

It is not a weakly prime, because it can be changed into another prime (2190958999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1095479496 + 1095479497.

It is an arithmetic number, because the mean of its divisors is an integer number (1095479497).

Almost surely, 2^2190958993 is an apocalyptic number.

It is an amenable number.

2190958993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2190958993 is an equidigital number, since it uses as much as digits as its factorization.

2190958993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1574640, while the sum is 55.

The square root of 2190958993 is about 46807.6809188407. The cubic root of 2190958993 is about 1298.8073861179.

The spelling of 2190958993 in words is "two billion, one hundred ninety million, nine hundred fifty-eight thousand, nine hundred ninety-three".